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Date: Mon, 05 Oct 2009 13:17:00 -0000
From: Michael Matz <matz@suse.de>
To: Paul Edwards <mutazilah@gmail.com>
Cc: Ian Lance Taylor <iant@google.com>, gcc@gcc.gnu.org
Subject: Re: i370 port - constructing compile script
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Hi,

On Sun, 4 Oct 2009, Paul Edwards wrote:

> With 3.4.6, I have a script called "compile", which looks like this:
> 
> call stdcomp alias.c %1 %2 %3 %4 %5 %6 %7 %8 %9
> call stdcomp alloc-pool.c %1 %2 %3 %4 %5 %6 %7 %8 %9
> call stdcomp attribs.c %1 %2 %3 %4 %5 %6 %7 %8 %9
> call stdcomp bb-reorder.c %1 %2 %3 %4 %5 %6 %7 %8 %9
> call stdcomp bitmap.c %1 %2 %3 %4 %5 %6 %7 %8 %9
> call stdcomp bt-load.c %1 %2 %3 %4 %5 %6 %7 %8 %9
> ...
> gcc -s -nostdlib -o gccmvs.exe *.o ../../pdos/pdpclib/pdpwin32.a -lkernel32
> 
> I believe that a simple script like above can be *generated* with a few 
> lines of changes to an appropriate makefile.  That's why I mentioned 
> before that I'm after a makefile target that only lists the object code 
> that would go into a stage 1 executable.

Ignoring the cross stuff, if this is all you need I would suggest calling 
make in the right way to generate this script.  We'll use a fake 
"compiler" for making cc1 which does nothing else than appending its 
command line to your compile script.  Hence, create a script 
collect-stuff.sh with this content:

-------- snip ----------
#!/bin/sh
echo stdcomp ${1+"$@"} >> /tmp/compile
-------- snap ----------

Now we'll call make so that it only tries to make cc1 with this compiler 
to collect the commands:

% cd gcc
% make CC=collect-stuff.sh cc1

/tmp/compile will now fill up with the commands to use.  If you don't need 
the various options, also add "ALL_COMPILERFLAGS= ALL_CPPFLAGS=" to the 
make command (might be other variable names in the old 4.x compilers), or 
amend the collect-stuff.sh script to not echo them.

Remember to clean the build dir before doing this as otherwise some .o 
files aren't remade.


Ciao,
Michael.